Retrieve data from a string.

I want to write a SQL script to retreive data between the third "|" and the forth "|" from a string:
Example:
String = 'H000319|VI|12|20000|20000|4201840007403429,09/2008,442667,,|'
The result should be 20000.
String = 'H000319|HK|0|11860|11860||'
The result should be 11860.
Many thanks!

With INSTR you can search for the n'th occurence of a character like this:
select substr('H000319|HK|0|11860|11860||'
             , instr('H000319|HK|0|11860|11860||', '|', 1, 3 ) + 1
             , length('H000319|HK|0|11860|11860||') - instr('H000319|HK|0|11860|11860||', '|', 1, 4 ) - 2
            ) from dual

Similar Messages

Retrieve data from a dynamic page via loadURL

Hello.
I would like to ask you how it is possible to retrieve data
from a dynamic page (asp classic in my case) using the loadURL
method.
I would like to create an html authentication form (with
username and password fields). The loadURL method should call an
asp page and then pass to the usual function 'DoIfSucceded' the
results of the elaboration.
Of course I'm going to have a switch in the function in order
to make different actions depending from the results of the asp
page (authentication succeded or failed).
I had a look to the examples at this page:
Adobe
samples
Is there anyone who can explain clearly how the results data
must be written by the asp page and how the success function can
retrieve them ?
I thank you in advance for your help.

loadURL() uses the the XMLHttpRequest Object so if the
content you return is XML, you have 2 choices for accessing your
data. You can either access it as a text string via the
XMLHttpRequest object's responseText property, or as a DOM document
via the XMLHttpRequest object's responseXML property:
function MySuccessCallback(req)
// If my data is XML, I can access the data that was sent
from the server
// as DOM elements via the XMLHttpRequest's responseXML
property.
var xmlDOM = req.xhRequest.responseXML;
// OR, you can access the data sent back from the server as
text via
// the XMLHttpRequest object's responseText property.
var xmlAsAString = req.xhRequest.responseText;
var req = Spry.Utils.loadURL("GET",
"/app/book.php?id=1&code=54321", true, MySuccessCallback);
If your serverside script wants to use some other format as a
response like JSON or plain text, then you can only access the data
as text via the responseText property.
--== Kin ==--

Unable to retrieve data from a Associative Array (?)

Hi!!!! :)))
i've a problem!!!
this is the oracle's code:
Package GEST_REPORT
IS
type rec_url is record(
TIBCDCON TBISD_30.TIBCDCON%TYPE,
etc...
SETDEL VARCHAR2(10)
type tab2 is table of rec_url index by binary_integer;
FUNCTION MAIN_SELECT
( CPLAS IN VARCHAR2)
RETURN tab2;
END;
...and a java code:
String storedProcedure = "{? = call GEST_REPORT.MAIN_SELECT(?)}";
String result = "";
try{
if (connection != null) {
CallableStatement callableStatement = null;
callableStatement = preprepareCall(storedProcedure);
// preparo parametri di input.
callableStatement.setString(2, "OM");
callableStatement.registerOutParameter(1, oracle.jdbc.driver.OracleTypes.ARRAY, "tab2");
and so on...
In the last line of code throws an 'invalid name pattern'
or
"ORA-21700: object does not exist or is marked for delete"
if registerOutParameter(1, oracle.jdbc.driver.OracleTypes.ARRAY, "ISDSV.GEST_REPORT").
Where TAB2: IS THE MY ARRAY (OR NESTED TABLE?);
GEST_REPORT: THE NAME OF PACKAGE;
ISDSV: THE USER.
do u have suggestion for retrieve data from TAB2 in JAVA??
THKS!!!!!!

Hi
Use fully qualified type name: schema_name.type_name. For your case that would be "ISDSV.tab2"
Cherrs :))

How to retrieve data from a jsp page

I have created a page with some text boxes, file, submit button. In my Ist jsp, i am dynamically add Text boxes and File (for Uploading).
In the 2nd jsp, i am used Jakarata FileUpload API. I am able to retrieve all data and files except that value of dynamicall added text boxes. That is, I cannot retrieve data from dynamically added text boxes.
Using Jakarata FileUpload API, i can retrieve values of form data using
getString() method.
I want to know that there is any way or method for retrieving form data values into String Array.
regards
madhu
[email protected]

Use parseRequest(request) to get the file information as you already are doing. However, I dont know how you can use request.getParameter("textField1") to get the other fields from the page. My work-around is as follows:
Change your submit button to an ordinary button and add an onClick event to it. Then in the javascript function that supports the onClick, add the textField1 as follows:
<form name="fileUploadForm" method="post" action="someAction" (((more code code here)))))
function submitButtonClick(){
document.fileUploadForm.action=
document.fileUploadForm.action+
"?textField1="+document.fileUploadForm.textField1.value"+
"&textField2="+document.fileUploadForm.textField2.value"+
"&textField3="+document.fileUploadForm.textField3.value";
document.fileUploadForm.submit();
As you can see in the above code, I append the textField1 name/value pair to the end of the action. Now in the server, you can use getParameter("textField1");

Troubles to retrieve data from a sharepoint List 2013

Im having some troubles when i try to retrieve data from a list in sharepoint 2013.
SPSite osite = new SPSite(@"http://contoso.com");
SPWeb web = osite.OpenWeb();
SPList list = web.Lists["Calendar"];
SPListItemCollection collection = list.Items;
foreach (SPListItem item in collection)
Console.WriteLine(item["Title"]);
And im getting this error: System.InvalidOperationException: Exception of type 'System.InvalidOperationException' was thrown.
I did a research in MSDN and i could connect to a diferent list in SharePoint 2010 using Visual Studio 2010, but now im using Visual Studio 2012 to connect to SharePoint 2013 and i dont get the same result.
Im using the DLL Microsoft.SharePoint. 15.0.0.0
Thanks!

I am not able to trace what could be causing the issue, as I would probably need to look at the entire code. But I quickly put together few lines of code and they seem to work for me on SP 2013 as well as 2010. I have modified your code on these lines, can
you please try the following and let me know if it works:
SPSite osite = new SPSite("http://contoso.com");
SPWeb web = osite.OpenWeb();
string Url = web.ServerRelativeUrl + "/lists/Calendar";
SPList list = web.GetList(Url);
SPListItemCollection collection = list.GetItems();
foreach (SPListItem item in collection)
Console.WriteLine(item["Title"]);
The following link talks about the SPList.GetItems method, hope this helps.
http://msdn.microsoft.com/en-us/library/ms457534(v=office.15).aspx
Vishal

Problem retrieving Data from a CDATA-Section using XMLDOM

Hello,
Ware: Oracle 8.1.7.4 64bit, XDK for PL/SQL Version 9.2.0.3, Solaris8 64bit
I can't retrieve Data from the CDATA-Section of an XML-String, neither with
getData(DOMCharacterData) or substringData. Also getLength fails. I get always
the following error:
ERROR at line 1:
ORA-29532: Java call terminated by uncaught Java exception: java.lang.ClassCastException
ORA-06512: at "XML_SCHEMA.XMLCHARDATACOVER", line 0
ORA-06512: at "XML_SCHEMA.XMLDOM", line 853
ORA-06512: at "SCHWABE.XML_TEST", line 47
ORA-06512: at line 1
I can successfully cast the DOMNode to a CharacterData with makeCharacterData
and check with isNull (DOMCharacterData) (returns FALSE).
My Testcase:
1) A Function which build a XML-Document:
CREATE OR REPLACE FUNCTION XML_ResponseCalc RETURN VARCHAR2 IS
doc VARCHAR2(32767);
BEGIN
doc :=
'<?xml version="1.0" encoding="UTF-8"?>
<RSDecEng>
<Version>1.00</Version>
<ResponseCalc>
<ID>00000000000000000014</ID>
<Burst>
<Definition>
<Count>1</Count>
<ID>
<Start>1</Start>
<Length>4</Length>
</ID>
<Var>
<Name>Risiko_1</Name>
<Start>5</Start>
<Length>5</Length>
</Var>
</Definition>
<Data>
<Length>9</Length>
<Count>5</Count>
<![CDATA[
1 0.001
2 0.002
3 0.003
4 0.004
5 0.005
6 0.006
7 0.007
8 0.008
9 0.009
10 0.010
]]>
</Data>
</Burst>
</ResponseCalc>
</RSDecEng>
2) The Procedure which parses the XML-Document (no Exception-Handling):
CREATE OR REPLACE PROCEDURE XML_TEST IS
Parser XML_SCHEMA.XMLParser.Parser;
DOMDocument XML_SCHEMA.XMLDOM.DOMDocument;
DOMNode XML_SCHEMA.XMLDOM.DOMNode;
DOMNodeItem XML_SCHEMA.XMLDOM.DOMNode;
DOMNodeList XML_SCHEMA.XMLDOM.DOMNodeList;
DOMCharacterData XML_SCHEMA.XMLDOM.DOMCharacterData;
TheDocument CLOB;
ID VARCHAR2(100);
Data VARCHAR2(200);
BEGIN
-- LOB
DBMS_LOB.CREATETEMPORARY(TheDocument, TRUE);
DBMS_LOB.WRITEAPPEND(TheDocument, LENGTH(XML_ResponseCalc), XML_ResponseCalc);
-- Parse
Parser := XML_SCHEMA.XMLParser.NewParser;
XML_SCHEMA.XMLParser.ParseCLOB(Parser, TheDocument);
DOMDocument := XML_SCHEMA.XMLParser.GetDocument(Parser);
XML_SCHEMA.XMLParser.FreeParser(Parser);
-- Node
DOMNode := XML_SCHEMA.XMLDOM.MakeNode(DOMDocument);
-- Get ID
DOMNodeList := XML_SCHEMA.XSLProcessor.SelectNodes
(DOMNode,'/RSDecEng/ResponseCalc/ID/text()');
IF XML_SCHEMA.XMLDOM.GetLength(DOMNodeList) > 0 THEN
DOMNodeItem := XML_SCHEMA.XMLDOM.Item(DOMNodeList, 0);
XML_SCHEMA.XMLDOM.WriteToBuffer(DOMNodeItem, ID);
SYS.DBMS_OUTPUT.PUT_LINE ('ID: '||ID);
END IF;
-- Get CDATA
DOMCharacterData := XML_SCHEMA.XMLDOM.MakeCharacterData(DomNode); -- <-- ok here...
IF NOT XML_SCHEMA.XMLDOM.isNull (DOMCharacterData) THEN -- <-- ...and here
Data := XML_SCHEMA.XMLDOM.GETDATA(DOMCharacterData); -- <-- ...but here Exception raise
END IF;
END;
I hope you can help me.
Thank you in advance
Markus Schwabe

You need to notice the definitions for makecharacterdata:
FUNCTION makeCharacterData(n DOMNode) RETURN DOMCharacterData;
PURPOSE
Casts given DOMNode to a DOMCharacterData
It only do the casting.

How to Retrieve data from database into another form ?

Good Day!
Am currently new at JSP. I've been studying it for awhile and still getting the hang of it. We are working on a project.
Editing a given data. We have to retrieve the given data and post it to another form "Editing form".
Since we can retrieve data using JSP but how are we going to post it to another form? I mean how are we going to transfer data from one form to another?
Can anyone help me with codes please..

The client is a web browser.
The client submits a request (click a link, visit a form)
The server gets to respond to this
- look at request parameters from the client
- access database
- produce resulting html page
- send page back to client.
The standard pattern is to retrieve data from the database in java code, and then load that data into a bean.
You then make that bean available as an attribute
It is then available for use in your JSP - either <jsp:useBean> tag or using ${ELexpressions}
All you can pass from the client to the server is request parameters - which are always strings.
Draw a picture of where the information is, and the information flows. Very rarely does it go directly from one "form" to another.
Cheers,
evnafets

Need Sample code to retrieve Data from Portal DB(Oracle)

Would anyone provide me steps to create application with a sample code to retrieve data from portal DB which is oracle and see the output in table format.

Hi Bris ,
The sample code , you didnt specified from where do u want to access the oracle thorough java code or through webdynpro .
Sample code to access through Java
import java.sql.*;
class Customer
public static void main(String args[]) throws SQLException
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
System.out.println("Connecting to the database...");
try
Connection cn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","scott","t");
Statement st=cn.createStatement();
ResultSet rs=st.executeQuery("select 'Connected' from dual");
rs.next();
String s=rs.getString(1);
System.out.println(s);
st.close();
cn.close();
catch(Exception ex)
System.out.println("The exception raised is:" + ex);
[code]
If accessing through JDBC datasorce.
https://www.sdn.sap.com/irj/sdn/thread?threadID=328550
https://www.sdn.sap.com/irj/sdn/thread?threadID=309386
[code]
package com.dhl.employeemodel;
import java.sql.Connection;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;
public class DBConnectionManager {
     Connection connection;
      * @return
     public Connection getConnection() {
          try
               Context jndiContext = new InitialContext();
               DataSource ds = (DataSource)jndiContext.lookup("jdbc/MyAlias");
               connection = ds.getConnection();
         catch(Exception connectionErrEx)
               //connectionErrEx.printStackTrace();
               return null;
          return connection;
Thanx
Pankaj

Problems with retrieving data from tables with 240 and more records

Hi,
I've been connecting to Oracle 11g Server (not sure exact version) using Oracle 10.1.0 Client and O10 Oracle 10g driver. Everything was ok.
I installed Oracle 11.2.0 Client and I started to have problems with retrieving data from tables.
First I used the same connection string, driver and so on (O10 Oracle 10g) then I tried ORA Oracle but with no luck. The result is like this:
I'm able to connect to database. I'm able to retrieve data but from small tables (e.g. with 110 records it works perfectly using both O10 and ORA drivers). When I try to retrieve data from tables with like 240 and more records retrieval simply hangs (nothing happens at all - no error, no timeout). Application seems to hang forever.
I'm using Powerbuilder to connect to Database (either PB10.5 using O10 driver or PB12 using ORA driver). I used DBTrace, so I see that query hangs on the first FETCH.
So for the retrievals that hang I have something like:
(3260008): BIND SELECT OUTPUT BUFFER (DataWindow):(DBI_SELBIND) (0.186 MS / 18978.709 MS)
(3260008): ,len=160,type=DECIMAL,pbt=4,dbt=0,ct=0,prec=0,scale=0
(3260008): ,len=160,type=DECIMAL,pbt=4,dbt=0,ct=0,prec=0,scale=1
(3260008): ,len=160,type=DECIMAL,pbt=4,dbt=0,ct=0,prec=0,scale=0
(3260008): EXECUTE:(DBI_DW_EXECUTE) (192.982 MS / 19171.691 MS)
(3260008): FETCH NEXT:(DBI_FETCHNEXT)
and this is the last line,
while for retrievals that end, I have FETCH producing time, data in buffer and moving to the next Fetch until all data is retrieved
On the side note, I have no problems with retrieving data either by SQL Developer or DbVisualizer.
Problems started when I installed 11.2.0 Client. Even if I want to use 10.0.1 Client, the same problem occurs. So I guess something from 11.2.0 overrides 10.0.1 settings.
I will appreciate any comments/hints/help.
Thank you very much.

pgoel wrote:
I've been connecting to Oracle 11g Server (not sure exact version) using Oracle 10.1.0 Client and O10 Oracle 10g driver. Everything was ok.Earlier (before installing new stuff) did you ever try retrieving data from big tables (like 240 and more records), if yes, was it working?Yes, with Oracle 10g client (before installing 11g) I was able to retrieve any data, either it was 10k+ records or 100 records. Installing 11g client changed something that even using old 10g client (which I still have installed) fails to work. The same problem occur no matter I'm using 10g or 11g client now. Powerbuilder hangs on retrieving tables with more than like 240 records.
Thanks.

Failed to retrieve data from the database. Details: [Database Vendor .....

Hello,
I hope that is the right forum for this issue.
We have the application 'Lodestar' for some years.
The frond-end is ASP and the database is Oracle 9. Lodestar has its own backend language "Rules language". The crystal version is 10
Now we have a new version of Lodestar with ASP and ASP.NET, Oracle 11g and Crystal 11.
But when we run some reports with the new version we get the error "Failed to retrieve data from the database. Details: [Database Vendor Code: 1652 ] Failed to retrieve data from the database." When I google on this error then it seems that it has something todo with tablespace.
We have changed the tablespace volume from 32Gb to 100Gb, but we still get this error.
Has anybody an idea what the cause could be?
Error
<REPORT_ERROR>
<REPORT_NAME>G_GV_DEALLIST</REPORT_NAME>
<REPORT_TYPE>CRYSTAL</REPORT_TYPE>
<MESSAGE>Failed to retrieve data from the database. Details: [Database Vendor Code: 1652 ] Failed to retrieve data from the database. Error in File G_GV_DEALLIST{54DEAA95-37B9-495B-B7E8-76BC575FA75F} {A3D1B090-322B-47D3-A84F-F003FF482C48}.rpt: Failed to retrieve data from the database. Details: [Database Vendor Code: 1652 ]</MESSAGE>
<STACK_TRACE>at CrystalDecisions.ReportAppServer.ConvertDotNetToErom.ThrowDotNetException(Exception e) at CrystalDecisions.ReportSource.EromReportSourceBase.ExportToStream(ExportRequestContext reqContext) at CrystalDecisions.CrystalReports.Engine.FormatEngine.ExportToStream(ExportRequestContext reqContext) at CrystalDecisions.CrystalReports.Engine.ReportDocument.ExportToStream(ExportOptions options) at CrystalDecisions.CrystalReports.Engine.ReportDocument.ExportToStream(ExportFormatType formatType) at Lodestar.crComGen.crCrystalNet.crAppNet.crGenerateReport(String connectstr, String qualifier, String guid, String altconn, String login, String url, StreamWriter sw)</STACK_TRACE>
</REPORT_ERROR>
Thanks in advance.
With regards,
Nico

Thanks all for you're reaction.
Oke we have changed the temp space from 30 Gigs --> 200 Gigs, but still the problem occurs. To make the temp tablespace is not the good direction, this is what the dba'er told me.
I'm not a guru with SQL/Oracle, but what for me hard to understand is" why does it work with the old version and not with the new version anymore?
It is a very difficult view with unions (I'm not the developer of this view), and I think I'm gonna try to break-down this view in different small parts and try to find where it goes wrong. I don't see any other way to investigate this problem.
(I see now the reaction of upul indika.)
Edited by: user12054070 on 24-feb-2012 0:27

Failed to retrieve data from the database (Apache derby). Details: java.lang.reflect.InvacationTargetException

Post Author: johnnighter
CA Forum: Data Connectivity and SQL
Hi,Good Day !I followed crxi_java_bean_data_source.pdf to setup and configure Crystal Report XI (Product Version 11.0.0.1282, CR Developer; Product Type: Full).Below is the sample code.import java.sql.*;public class CRSampleDataSourceBean { private ResultSet resultSet = null; private Connection connection = null; private String connectionURL = "jdbc:derby:MyDatabase"; private String databaseClass = "org.apache.derby.jdbc.EmbeddedDriver"; private String query = "SELECT * FROM CUSTOMER"; public CRSampleDataSourceBean() { try { Class.forName(databaseClass); connection = DriverManager.getConnection(connectionURL, "", ""); } catch (ClassNotFoundException ex) { System.out.println("Ensure that database driver class is installed."); ex.printStackTrace(); } catch (SQLException ex) { System.out.println("SQL Exception #" + ex.getErrorCode() + " : " + ex.getLocalizedMessage()); ex.printStackTrace(); } } public ResultSet getResultSet() throws SQLException { Statement statement = connection.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY); resultSet = statement.executeQuery(query); return resultSet; }}Compile no error. It display at the "Java Beans Connectivity" screen, and able to select from the "Java Bean Classes" combobox.It display at the "Available Data Sources" (left hand side) with database name CRSampleDataSourceBean->getResultSet. BUT when click the ">" or ">>" button, it display an error message "Failed to retrieve data from the database. Details: java.lang.reflect.InvacationTargetException". Please advice. regards,johnnighter

Post Author: pvierheilig
CA Forum: Crystal Reports
Have you been able to resolve this yet? I don't have any reference to Oracle error codes but would suspect a quick Google of something like 'Oracle error code 997' should result in good information, since it is an Oracle error...
Hope this helps.

Failed to retrieve data from the database. [Database Vendor Code: 116]

My report is using Java Bean class as datasource and the Java Bean class calls a report-specific Java program to return a result set.
Report fails to generate and the error message is
Failed to retrieve data from the database. Details: [Database Vendor Code: 116 ]
Can anyone tell me what error code 116 means?
Thanks.

The problem is solved internally. Our team implemented a result set data structure that incorrectly converts a Double into a String before passing it to Crystal Report for rendering. Data Vendor Code I met yesterday was the outcome of illegal class conversion.
I have a side question; our development team would like to use log4j to log method calls invoked during rendering. Our problem could be solved earlier if we knew getString() was invoked instead of getDouble() during rendering. We thought of specifying the full path of log4j jar file in CRConfig.xml but we don't know how to configure CR to write logging information into a specific file location.
Please help.
Thanks

Error retrieving data from DB2 NoSuchMethodEror:sun.io.ByteToCharSingleByte

Hi All,
I am trying retrieve data from DB2 database using select command from java code,
able to establish connection but not getting the data, the following error was occurred,
can any one help out me...
Exception in thread "main" java.lang.NoSuchMethodError: sun.io.ByteToCharSingleByte.createCharMap(Ljava/lang/String;Z)[C
at sun.io.ByteToCharCp870.<clinit>(ByteToCharCp870.java:86)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.io.Converters.getConverterClass(Unknown Source)
at sun.io.Converters.newConverter(Unknown Source)
at sun.io.ByteToCharConverter.getConverter(Unknown Source)
at com.ibm.db2.jcc.b.j.a(j.java:426)
at com.ibm.db2.jcc.c.kc.a(kc.java:2366)
at com.ibm.db2.jcc.c.jb.a(jb.java:3167)
at com.ibm.db2.jcc.c.jb.a(jb.java:1720)
at com.ibm.db2.jcc.c.jb.a(jb.java:1647)
at com.ibm.db2.jcc.c.jb.n(jb.java:562)
at com.ibm.db2.jcc.c.jb.j(jb.java:247)
at com.ibm.db2.jcc.c.jb.c(jb.java:57)
at com.ibm.db2.jcc.c.w.c(w.java:42)
at com.ibm.db2.jcc.c.cc.h(cc.java:178)
at com.ibm.db2.jcc.b.sf.p(sf.java:1256)
at com.ibm.db2.jcc.b.sf.a(sf.java:1954)
at com.ibm.db2.jcc.b.sf.a(sf.java:523)
at com.ibm.db2.jcc.b.sf.executeQuery(sf.java:507)
Edited by: siva512 on Dec 11, 2008 5:37 PM

siva512 wrote:
Exception in thread "main" java.lang.NoSuchMethodError: sun.io.ByteToCharSingleByte.createCharMap(Ljava/lang/String;Z)[CThe mentioned method is missing in the mentioned class during runtime, while it was available during compiletime.
This generally indicate a version conflict. Your classpath is dirty. The older versioned class without that method apparently got precedence in classloading above the newer versioned class with that method. Cleanup your classpath. Check all classes/JAR´s and remove all duplicated older versions.

Try to retrieve data from database got error message

Try to retrieve data from database got error message *"java.lang.ArrayIndexOutOfBoundsException: 2*
*     sun.jdbc.odbc.JdbcOdbcPreparedStatement.clearParameter(JdbcOdbcPreparedStatement.java:1023)*
*     sun.jdbc.odbc.JdbcOdbcPreparedStatement.setDate(JdbcOdbcPreparedStatement.java:811)*
*     guestbk.doGet(guestbk.java:32)*
*     guestbk.doPost(guestbk.java:73)*
*     javax.servlet.http.HttpServlet.service(HttpServlet.java:710)*
*     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)"*
I have used prepared statment
java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat("dd/MM/yy");
            java.util.Date dt = sdf.parse(str3);
                   Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                   con=DriverManager.getConnection("jdbc:odbc:gbook");
                   //Statement stmt=con.createStatement();
PreparedStatement ps = con.prepareStatement("SELECT * from gbook where emailid =? AND date =?");
ps.setString(1,str1);
ps.setString(2,str2);
ps.setDate(3,new java.sql.Date(dt.getTime()));
//ps.executeQuery();
                   //ResultSet rs=stmt.executeQuery("select * from gbook where emailid = str1");
              ResultSet rs = ps.executeQuery();
                   out.println("<Html>");
                out.println("<Head>");
                   out.println("<Title>GuestBook</Title>");
                   out.println("</Head>");
                   out.println("<Table border=1 align=center >");
                   out.println("<H4><B><center>Teacher's Lesson Plan</center></B></H4><BR>");
                   out.println("<TR><TD><b>Teacher Name</b></TD><TD><b>Class</b></TD></TR>");
           while(rs.next())
                    ctr++;
                    String email=rs.getString("emailid");
                    String cmt=rs.getString("comment");
                    out.println("<TR><TD>"+email+"</TD><TD>"+cmt+"</TD></TR>");
        }Please anybody help .

PreparedStatement ps = con.prepareStatement("SELECT * from gbook where emailid =? AND date =?");
ps.setString(1,str1);
ps.setString(2,str2);
ps.setDate(3,new java.sql.Date(dt.getTime()));Your SQL query has 2 placeholders but you try to set 3 values.
And didn't you read the stack trace?
guestbk.doGet(guestbk.java:32)You could've tracked down line 32 and seen what was there at that line.
People on the forum help others voluntarily, it's not their job.
Help them help you.
Learn how to ask questions first: http://www.catb.org/~esr/faqs/smart-questions.html
----------------------------------------------------------------

Retrieve data from MS Access database.

Hi all,
The following is part of my coding. Once I have clicked the jButton1, the jTextField1 will get the input of user and store into a variable named "bbb". After that the variable will be passed to a function as a parameter to retrieve data from MS Access database using the ResultSet method. Next, the ResultSet will be splited into many part and just the student ic will be displayed.
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
        String bbb = jTextField1.getText(); //get input from user and store into a variable named bbb
        ResultSet codes = getCodes(bbb); //Retrieve data from database
        Code c = getCode (codes); //split the retireved date to many part
         jLabel2.setText(c.ic); //display the student ic only
   private static ResultSet getCodes(String bbb)
        Connection con = getConnection();
        try
        Statement s = con.createStatement();
        String select = "SELECT [Student-File].* " + "FROM [Student-File] WHERE (([Student-File].[student-code])=bbb); " ;
        ResultSet rows;
        rows = s.executeQuery(select);
        return rows;
        catch (SQLException e)
            System.out.println(e.getMessage());
        return null;
private static Code getCode (ResultSet codes)
        try
            String name = codes.getString("student-name");
            String scode = codes.getString("student-code");
            String ic = codes.getString ("student-ic");
            String add = codes.getString ("student-address");
            String phone = codes.getString ("student-phone");
          return new Code (name,scode,ic,add,phone);
        catch (SQLException e)
            System.out.println(e.getMessage());
        return null;
    private static class Code
        public String name ;
        public String scode ;
        public String ic ;
        public String add;
        public String phone;
        public Code (String name, String scode, String ic,String add,String phone)
            this.name = name;
            this.scode = scode;
            this.ic = ic;
            this.add = add;
            this.phone = phone;
}But after I have compiled the coding above, the following error existed.
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
[Microsoft][ODBC Microsoft Access Driver] Too few parameters. Expected 1.
at testing3.getCode(testing3.java:137)
[Microsoft][ODBC Microsoft Access Driver] Too few parameters. Expected 1.
at testing3.jButton1ActionPerformed(testing3.java:71)
at testing3.access$000(testing3.java:17)
at testing3$1.actionPerformed(testing3.java:45)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:234)
at java.awt.Component.processMouseEvent(Component.java:5488)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
at java.awt.Component.processEvent(Component.java:5253)
at java.awt.Container.processEvent(Container.java:1966)
at java.awt.Component.dispatchEventImpl(Component.java:3955)
at java.awt.Container.dispatchEventImpl(Container.java:2024)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
at java.awt.Container.dispatchEventImpl(Container.java:2010)
at java.awt.Window.dispatchEventImpl(Window.java:1774)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at testing3.getCode(testing3.java:137)
at testing3.jButton1ActionPerformed(testing3.java:71)
at testing3.access$000(testing3.java:17)
at testing3$1.actionPerformed(testing3.java:45)
My questions here are:
1) Will my idea above work?
2) Is it correct of my query statement that send to MS Access database?
Can anyone help me?
Thanks in advance,
ning.

you may try this:
String select = "SELECT * FROM your_table_name WHERE your_column_name = '" + bbb + "'";or another approach using PreparedStatement:
String select = "SELECT * FROM your_table_name WHERE your_column_name = ?";
PreparedStatement ps = con.prepareStatement(select);
ps.setString(1, "bbb");
ResultSet rs = ps.executeQuery();hth.

Retrieve data from a string.

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